In Outlook I use to have a way to check easily if a new meeting should be in conflict with another pre-existing. Could you please add something like that? it will be ver very usefull.
Another thing I would like you to add is a way to have an “Accept” / “Provitional” / “Reject” button into the button bar is that possible?
Finally a “Today” button over the Calendar Preview window will be very usefull.